This is a word that can mean any thing you want it to mean in a given context.. so it could mean many different things depending on how and where u say it... it can also be modified, for example I am the runkmaster (the master of every thing)

I wanna go runk to the shops... ill runk this fucking hot bint so hard... Lets go on a runk mission( awesome mission).. that girl is so runkable(fuckable)